/*
 * Copyright (c) 2017  STMicroelectronics – All rights reserved
 * The STMicroelectronics corporate logo is a trademark of STMicroelectronics
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice, this list of conditions
 *   and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright notice, this list of
 *   conditions and the following disclaimer in the documentation and/or other materials provided
 *   with the distribution.
 *
 * - Neither the name nor trademarks of STMicroelectronics International N.V. nor any other
 *   STMicroelectronics company nor the names of its contributors may be used to endorse or
 *   promote products derived from this software without specific prior written permission.
 *
 * - All of the icons, pictures, logos and other images that are provided with the source code
 *   in a directory whose title begins with st_images may only be used for internal purposes and
 *   shall not be redistributed to any third party or modified in any way.
 *
 * - Any redistributions in binary form shall not include the capability to display any of the
 *   icons, pictures, logos and other images that are provided with the source code in a directory
 *   whose title begins with st_images.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 */

package com.st.blesensor.cloud.util;

import androidx.annotation.NonNull;

import com.st.blesensor.cloud.CloudIotClientConnectionFactory;

//import org.eclipse.paho.android.service.MqttAndroidClient;
import info.mqtt.android.service.MqttAndroidClient;
import org.eclipse.paho.client.mqttv3.IMqttActionListener;
import org.eclipse.paho.client.mqttv3.IMqttToken;

public abstract class MqttClientConnectionFactory implements CloudIotClientConnectionFactory {

    protected class MqttClient implements CloutIotClient{
        public final MqttAndroidClient mqtt;

        public MqttClient(MqttAndroidClient client) {
            this.mqtt = client;
        }
    }

    protected static MqttAndroidClient extractMqttClient(CloutIotClient client){
        if(!(client instanceof MqttClient))
            return null;
        return ((MqttClient) client).mqtt;
    }

    protected static IMqttActionListener buildMqttListener(final ConnectionListener listener){
        return  new IMqttActionListener() {
            @Override
            public void onSuccess(IMqttToken asyncActionToken) {
                listener.onSuccess();
            }

            @Override
            public void onFailure(IMqttToken asyncActionToken, Throwable exception) {
                listener.onFailure(exception);
            }
        };
    }

    @Override
    public void disconnect(@NonNull CloutIotClient client) throws Exception {
        MqttAndroidClient mqttClient = extractMqttClient(client);
        if (mqttClient != null) {
            mqttClient.disconnect();
        }
    }

    @Override
    public void destroy(@NonNull CloutIotClient client) {
        MqttAndroidClient mqttClient = extractMqttClient(client);
        if (mqttClient != null) {
            mqttClient.close();
            mqttClient.unregisterResources();
        }
    }

    @Override
    public boolean isConnected(@NonNull CloutIotClient client) {
        MqttAndroidClient mqttClient = extractMqttClient(client);
        try {
            return (mqttClient != null && mqttClient.isConnected());
        }catch (IllegalArgumentException e){
            //is connect can return illegal argument exception if the client is not available
            // https://github.com/eclipse/paho.mqtt.android/issues/238
            return false;
        }
    }
}
